U full cash the $73k? Or take loan?
If you took loan, see how much outstanding balance and how much
your car can sell now and how much you have to top up.
Ppl generally say 'break-even' at around 5th year, where most
likely your loan and car sale price is more or less same. 1st and
2nd year supposedly lose the most.
Anyway, you lose money cuz car price dropped but also getting new
car at a lower price. So more or less the same. E.g you bot your
car $73k for a 1.4k... nowadays $73k could have bought the special
offer WRX!!
So in your calculations, just consider although you selling your
old car at loss, you are buying your new car 'cheaper' than last
time.